Total noob question

I apologize for this totally lame noob question. How do disk brakes work on a horizontal dropout singlespeed(no smartass answers please)? How can u take the wheel on and off? Please, no flaming.
thanks

Here

This is what I am talking abouthttp://bianchiusa.com/typo3temp/81c4362b59.jpg
If I got this bianchi G.U.S.S would I be able to take the rear wheel off if I flat on a trail. Is there something on this bike that alows easy removal of the rear wheel without having to remove the rear disk brake caliper?

My Surly Karate Monkey seems to be similar. With my Formula 4Racing, I had to loosen one, and remove a second caliper bolt.
Not all calipers sit at the same angle, thus apparently some brakes did not require any adjustment for wheel removal. I'm not sure which. However, if you find a rotor with "bites" taken from the edge, I've heard that those bites can be used for easy wheel removal. Set the bite over on the edge of the caliper and voila. I also wouldn't know for which rotor/caliper/frame it would that way.

when my 4Racing went back for maintenance, I swapped to a rear V, and never looked back. Lighter, simpler, easier to maintain and adjust. Horizontal dropouts take enough of my skills and patience for wheel removals, even without discs.

This is what I am talking abouthttp://bianchiusa.com/typo3temp/81c4362b59.jpg
If I got this bianchi G.U.S.S would I be able to take the rear wheel off if I flat on a trail. Is there something on this bike that alows easy removal of the rear wheel without having to remove the rear disk brake caliper?

You don't need to remove the caliper. Just remove a bolt, loosen the other one, and swing the caliper up a little.

No problem with Avids. Can be problematic if you have shims to align your disc brake.

The other downside is the force reaction from the disc brake can cause the rear wheel to move backwards on the disc side - a direction that isn't resisted by the chaintug.